lustre/osd-zfs/osd_lproc.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osd-zfs/osd_lproc.c
  37  *
  38  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  39  * Author: Mike Pershin <tappro@whamcloud.com>
  40  */
  41
  42 #define DEBUG_SUBSYSTEM S_OSD
  43
  44 #include <obd.h>
  45 #include <obd_class.h>
  46 #include <lprocfs_status.h>
  47 #include <lustre/lustre_idl.h>
  48
  49 #include "osd_internal.h"
  50
  51 #ifdef LPROCFS
  52
  53 static int osd_stats_init(struct osd_device *osd)
  54 {
  55         int result;
  56         ENTRY;
  57
  58         osd->od_stats = lprocfs_alloc_stats(LPROC_OSD_LAST, 0);
  59         if (osd->od_stats != NULL) {
  60                 result = lprocfs_register_stats(osd->od_proc_entry, "stats",
  61                                 osd->od_stats);
  62                 if (result)
  63                         GOTO(out, result);
  64
  65                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_GET_PAGE,
  66                                 LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
  67                                 "get_page", "usec");
  68                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_NO_PAGE,
  69                                 LPROCFS_CNTR_AVGMINMAX,
  70                                 "get_page_failures", "num");
  71                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
  72                                 LPROCFS_CNTR_AVGMINMAX,
  73                                 "cache_access", "pages");
  74                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_HIT,
  75                                 LPROCFS_CNTR_AVGMINMAX,
  76                                 "cache_hit", "pages");
  77                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_MISS,
  78                                 LPROCFS_CNTR_AVGMINMAX,
  79                                 "cache_miss", "pages");
  80                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_COPY_IO,
  81                                 LPROCFS_CNTR_AVGMINMAX,
  82                                 "copy", "pages");
  83                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_ZEROCOPY_IO,
  84                                 LPROCFS_CNTR_AVGMINMAX,
  85                                 "zerocopy", "pages");
  86                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_TAIL_IO,
  87                                 LPROCFS_CNTR_AVGMINMAX,
  88                                 "tail", "pages");
  89 #ifdef OSD_THANDLE_STATS
  90                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_STARTING,
  91                                 LPROCFS_CNTR_AVGMINMAX,
  92                                 "thandle_starting", "usec");
  93                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_OPEN,
  94                                 LPROCFS_CNTR_AVGMINMAX,
  95                                 "thandle_open", "usec");
  96                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_CLOSING,
  97                                 LPROCFS_CNTR_AVGMINMAX,
  98                                 "thandle_closing", "usec");
  99 #endif
 100         } else {
 101                 result = -ENOMEM;
 102         }
 103
 104 out:
 105         RETURN(result);
 106 }
 107
 108 static int zfs_osd_fstype_seq_show(struct seq_file *m, void *data)
 109 {
 110         return seq_printf(m, "zfs\n");
 111 }
 112 LPROC_SEQ_FOPS_RO(zfs_osd_fstype);
 113
 114 static int zfs_osd_mntdev_seq_show(struct seq_file *m, void *data)
 115 {
 116         struct osd_device *osd = osd_dt_dev((struct dt_device *)m->private);
 117
 118         LASSERT(osd != NULL);
 119         return seq_printf(m, "%s\n", osd->od_mntdev);
 120 }
 121 LPROC_SEQ_FOPS_RO(zfs_osd_mntdev);
 122
 123 static ssize_t
 124 lprocfs_osd_force_sync_seq_write(struct file *file, const char __user *buffer,
 125                                 size_t count, loff_t *off)
 126 {
 127         struct seq_file   *m = file->private_data;
 128         struct dt_device  *dt = m->private;
 129         struct lu_env      env;
 130         int rc;
 131
 132         rc = lu_env_init(&env, LCT_LOCAL);
 133         if (rc)
 134                 return rc;
 135         rc = dt_sync(&env, dt);
 136         lu_env_fini(&env);
 137
 138         return rc == 0 ? count : rc;
 139 }
 140 LPROC_SEQ_FOPS_WO_TYPE(zfs, osd_force_sync);
 141
 142 static int zfs_osd_iused_est_seq_show(struct seq_file *m, void *data)
 143 {
 144         struct osd_device *osd = osd_dt_dev((struct dt_device *)m->private);
 145         LASSERT(osd != NULL);
 146
 147         return seq_printf(m, "%d\n", osd->od_quota_iused_est);
 148 }
 149
 150 static ssize_t
 151 zfs_osd_iused_est_seq_write(struct file *file, const char __user *buffer,
 152                              size_t count, loff_t *off)
 153 {
 154         struct seq_file   *m = file->private_data;
 155         struct dt_device  *dt = m->private;
 156         struct osd_device *osd = osd_dt_dev(dt);
 157         int                rc, val;
 158
 159         LASSERT(osd != NULL);
 160
 161         rc = lprocfs_write_helper(buffer, count, &val);
 162         if (rc)
 163                 return rc;
 164
 165         osd->od_quota_iused_est = !!val;
 166
 167         return count;
 168 }
 169 LPROC_SEQ_FOPS(zfs_osd_iused_est);
 170
 171 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_blksize);
 172 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytestotal);
 173 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytesfree);
 174 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytesavail);
 175 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_filestotal);
 176 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_filesfree);
 177
 178 struct lprocfs_seq_vars lprocfs_osd_obd_vars[] = {
 179         { .name =       "blocksize",
 180           .fops =       &zfs_dt_blksize_fops            },
 181         { .name =       "kbytestotal",
 182           .fops =       &zfs_dt_kbytestotal_fops        },
 183         { .name =       "kbytesfree",
 184           .fops =       &zfs_dt_kbytesfree_fops         },
 185         { .name =       "kbytesavail",
 186           .fops =       &zfs_dt_kbytesavail_fops        },
 187         { .name =       "filestotal",
 188           .fops =       &zfs_dt_filestotal_fops         },
 189         { .name =       "filesfree",
 190           .fops =       &zfs_dt_filesfree_fops          },
 191         { .name =       "fstype",
 192           .fops =       &zfs_osd_fstype_fops            },
 193         { .name =       "mntdev",
 194           .fops =       &zfs_osd_mntdev_fops            },
 195         { .name =       "force_sync",
 196           .fops =       &zfs_osd_force_sync_fops        },
 197         { .name =       "quota_iused_estimate",
 198           .fops =       &zfs_osd_iused_est_fops         },
 199         { 0 }
 200 };
 201
 202 int osd_procfs_init(struct osd_device *osd, const char *name)
 203 {
 204         struct obd_type *type;
 205         int              rc;
 206         ENTRY;
 207
 208         if (osd->od_proc_entry)
 209                 RETURN(0);
 210
 211         /* at the moment there is no linkage between lu_type
 212          * and obd_type, so we lookup obd_type this way */
 213         type = class_search_type(LUSTRE_OSD_ZFS_NAME);
 214
 215         LASSERT(name != NULL);
 216         LASSERT(type != NULL);
 217
 218         osd->od_proc_entry = lprocfs_seq_register(name, type->typ_procroot,
 219                         lprocfs_osd_obd_vars, &osd->od_dt_dev);
 220         if (IS_ERR(osd->od_proc_entry)) {
 221                 rc = PTR_ERR(osd->od_proc_entry);
 222                 CERROR("Error %d setting up lprocfs for %s\n", rc, name);
 223                 osd->od_proc_entry = NULL;
 224                 GOTO(out, rc);
 225         }
 226
 227         rc = osd_stats_init(osd);
 228
 229         GOTO(out, rc);
 230 out:
 231         if (rc)
 232                 osd_procfs_fini(osd);
 233         return rc;
 234 }
 235
 236 int osd_procfs_fini(struct osd_device *osd)
 237 {
 238         ENTRY;
 239
 240         if (osd->od_stats)
 241                 lprocfs_free_stats(&osd->od_stats);
 242
 243         if (osd->od_proc_entry) {
 244                 lprocfs_remove(&osd->od_proc_entry);
 245                 osd->od_proc_entry = NULL;
 246         }
 247
 248         RETURN(0);
 249 }
 250
 251 #endif